Question

<1 and <2 are same side interior angles formed by two parallel lines a transversal. If m<1=115, what is m<2?

Answer 1

According to your description
<1 + <2 = 180
115 + <2 = 180
<2 = 65

Answer 2

One of the same side angles of two parallel lines is 20° smaller than the other one. Find all angles.